Matrix design of light weight, high strength, high ductility ECC

Zhang, Zhigang; Yuvaraj, A. R.; Di, Jin; Qian, Shunzhi

doi:10.1016/j.conbuildmat.2019.03.159

Cited by 131 publications

(29 citation statements)

References 35 publications

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“…In recent years, using ultra-high performance concrete (UHPC) with FRP bars has been suggested by researchers [9][10][11] in order to satisfy the requirements for FRP bar-reinforced concrete members at the serviceability limit state. UHPC is an innovative cement-based engineering material, which was developed based on the ideas of eliminating coarse aggregates and optimizing particle packing density [12][13][14]. Compared with NC, UHPC exhibits unique strain-hardening characteristics, ultra-high compressive strength, superior toughness, and durability [15].…”

Section: The Proposed Frp Bar-reinforced Uhpc Short-ribbed Bridge Deckmentioning

confidence: 99%

“…are summarized in Table 5. Note that when calculating the punching shear capacity of the S80-30 slab by Equations (12)- (14), E f was replaced with E s . In Equations (6)- (14), the cylinder compressive strength of UHPC was required.…”

Section: Prediction Of Punching Shear Capacitiesmentioning

confidence: 99%

“…Note that when calculating the punching shear capacity of the S80-30 slab by Equations (12)- (14), E f was replaced with E s . In Equations (6)- (14), the cylinder compressive strength of UHPC was required. As experimentally indicated by Graybeal and Davis [34], the ratio of the cylinder compressive strength of UHPC to the cube compressive strength can be taken as 1.0.…”

Section: Prediction Of Punching Shear Capacitiesmentioning

confidence: 99%

“…Note: P exp. is the experimental punching shear capacity; symbol " a " means that the design codes including ACI 318-19 [25], CAN/CSA A2 3.3-04 [26] and JSCE 2010 [27] were used for the S80-30 slab; symbol " b " means that E f was replaced with E s in Equations (12)- (14).…”

Section: Prediction Of Punching Shear Capacitiesmentioning

confidence: 99%

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Experimental Study on One-Way BFRP Bar-Reinforced UHPC Slabs under Concentrated Load

Hou

2020

Materials

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The application of fiber-reinforced polymer (FRP) bars and ultra-high performance concrete (UHPC) in the field of civil engineering is promising. An innovative FRP bar-reinforced UHPC short-ribbed bridge deck slab, with low self-weight and high structural performance, was proposed in this study. The behavior of one-way basalt FRP (BFRP) bar-reinforced UHPC slabs under concentrated load was experimentally investigated, and compared with that of a steel bar-reinforced UHPC slab. The ultimate capacity of the one-way BFRP bar-reinforced UHPC slab was 0.59 times that of the steel bar-reinforced UHPC slab, while its ductility was better. Increasing the reinforcement ratio and loading area was beneficial to the ductility of one-way BFRP bar-reinforced UHPC slabs. Moreover, the model proposed by EI-Gamal et al. was found to be suitable for evaluating the punching shear capacities of one-way BFRP bar-reinforced UHPC slabs. However, the model failed to consider the unique strain-hardening characteristics of UHPC, which led to conservative prediction.

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Section: The Proposed Frp Bar-reinforced Uhpc Short-ribbed Bridge Deckmentioning

confidence: 99%

Section: Prediction Of Punching Shear Capacitiesmentioning

confidence: 99%

Section: Prediction Of Punching Shear Capacitiesmentioning

confidence: 99%

Section: Prediction Of Punching Shear Capacitiesmentioning

confidence: 99%

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Experimental Study on One-Way BFRP Bar-Reinforced UHPC Slabs under Concentrated Load

Hou

2020

Materials

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“…Great attention has been paid in past decades to enhance the mechanical performance of concrete due to its inherent weaknesses, such as low tensile strength, brittle nature, and poor crack-resistance. In recent years, randomly-distributed short fibers with specific properties (usually polyvinyl alcohol (PVA) or polyethylene (PE)) have been added to the cement-based matrix to develop a new kind of high performance of polymer fiber reinforced concrete (called engineered cementitious composite (ECC)) [1,2,3,4,5]. Although only a low fiber volume (typically lower than 2%) is employed, the tensile strain capacity of material can be improved significantly due to the interactions between the composite fibers and the cement matrix.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Damage Detection in ECC-Concrete Composite Beams Using Piezoelectric Transducers

Qin

Zhang

Xie

et al. 2019

Sensors

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The use of engineered cementitious composite (ECC) has attracted extensive attention in recent years because of the highly enhanced ductility owing to its unique strain-hardening behavior. In this paper, an electromechanical impedance-based technique is used to monitor the structural damage of RC beams strengthened with an ECC layer at the tensile zone. To achieve this purpose, three specimens are tested under bending loads to evaluate the proposed damage detection methodology. Five externally bonded PZT transducers are uniformly distributed at the surface of the ECC layer of the beams to measure the output conductance signatures in a healthy state and in different damage scenarios induced by different load levels. Test results showed that discrepancies exist between the signals measured in the intact state and each damage state, which can be used to evaluate the structural integrity changes. To assess the damage of ECC-concrete composite beams quantitatively, the statistical scalar index-root mean square deviation (RMSD) is used as the index, which can be calculated from the variations of conductance measurements of PZT sensors. The damage index values of the uniformly distributed PZT sensors provided cogent evidence of damage and revealed the evolution of structural damage. The crack patterns of beams at different damage levels are compared with the damage index values, and it shows the damage location can be derived from the measured conductance signatures of an array of PZT transducers.

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Properties and road engineering application of carbon fiber modified‐electrically conductive concrete

Liu

et al. 2020

Structural Concrete

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In order to solve the impact of road ice and snow on traffic, carbon fiber modified‐electrically conductive concrete (ECON) was prepared in the laboratory and applied in road engineering. The workability, mechanical properties, electrical conductivity and electro‐thermal effect of ECON were investigated. The microstructure was analyzed by scanning electron microscope. The results show that ECON with compressive strength grade of 30 MPa and resistivity of 0.1 Ω∙cm can be prepared by using carbon fibers with volume content of 0.75% and length of 9 mm. Semi‐dry mixing method and the use of cellulose ether have good dispersion effect on the carbon fibers. The performance of ECON in laboratory and field was compared and the ECON had a good workability, higher strength and lower resistivity in site construction for the high‐power force mixer was used.

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Matrix design of light weight, high strength, high ductility ECC

Cited by 131 publications

References 35 publications

Experimental Study on One-Way BFRP Bar-Reinforced UHPC Slabs under Concentrated Load

Experimental Study on One-Way BFRP Bar-Reinforced UHPC Slabs under Concentrated Load

Experimental Study on Damage Detection in ECC-Concrete Composite Beams Using Piezoelectric Transducers

Properties and road engineering application of carbon fiber modified‐electrically conductive concrete

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